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For example, an application may be multi core aware but by default only uses one core, the developer may make it take up multiple cores if started with the switch /cores 2 or if a program can span to multiple GBs of memory, there may be a switch that tells it the maximum it can take up - /maxmemory 1024

It is not built in and always there "because it is a service", it is something specific to each individual service programmed by the developer.

Basically they're just command-line parameters you pass to an executable file. They vary from service to service, check the service help docs for what parameters it accepts.
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invertNov 13 '09 at 14:05

its the same as command line parameters? because i am trying to read any parameter from the program and i got 0 zero parameters altought i am writing "/Debug" in this text box
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KarimNov 13 '09 at 16:19